Totalizing mechanism



June 13, 1933'. R. .1. MCFALL TOTALIZING MECHANISM Filed April 23, 1929 2 Sheets-Sheet 77//c 351i 5M, wyd/m/ June 13, 1933. R. J. MCFALL TOTALIZING MECHANISM Fi1ed,Apri1 25, 1929 2 Sheets-Sheet 2 39- column on the right Patented June 13, 1933 UNITED STATES PATENT. OFFICE ROBERT J'. MCFALL, OF CHERRYDALE, vIRGINIA, AVSSIGNOR T0 THE TABULATING MACHINE JCOMPANY, OF ENDICOTT, NEW YORK, A CORPORATION OF NEW JERSEY TOTALIZING Application led April 23,

sented concurrently to the apparatus.

'For clearness of illustration, the invention will .be described in connection with record cards having columnsv of gures printed thereon, and holes punched in said cards to l0 indicate values or amounts, in a well known manner, but the invention is not limited to the use of such 'record cards.

Record cards of the type referred to are shown anddescribed, for example, in Patents Nos. 777,209 and 945,236, to HermanV Hollerith, and therefore, need not be explained in'detail. In such cards, the index point positions in the eld, indicating values .or amounts, are determined by the locatlon 29 of the punched holes relative to one edge of 4the card. The figures or digits are arranged in columns, with zero at the top and 9 at the bottom, and the holes are punched at the location of these respective digits in accordance with the value or amount to be 1nd1- cated The columns of digits may be arranged singly or in groups of two, three or more, and when arranged in such groups, the iirst represents the units place, the next column tens, the third hundreds,etc. Each column or group of columns usually corresponds to a certain particular class of data being recorded, that is to say, to a certain kind, character, or type of article or material.

In well known systems heretofore employed, it has been the common practice to feed such perforated record cards seriatim 19 to integrating mechanism, and to so design the integrating mechanism that was capable of adding and indicating the total of the numbers represented by the positions of the holes in each column or group of columns of 15 all of the cards passing successively through the machine. Thusthe mechanism showed the total separate amounts of each class or type of article or material recorded on a given series of cards.

53 As distinguished from this well known MEGHANISM 1929. Serial No. 357,574.

method of integrating successive items of the same class presented seriatim to the mecha- 'nism, the object'of the present` invention is 'to provide mea-ns for indicating the sum of a plurality of items presented concurrently, or during the same cycle of operation of the mechanism. 4 Using the record cards as an illustration, while previous systems have provided means for adding only items occurring inthe same columnpositions on the successive cards, the present invention contemplates the cross-totalizing of items occurring in two or morediiferent groups of column positions on the samecard, and the integrating of these grand cross-totals as successive cards pass through. Y

To this end, I propose to employ a series of gear trains or interconnected dierential mechanisms, one for the units, one for the tens, etc., the number of mechanisms in each series corresponding with the number of columngroups on the cards, and to impart to i each mechanism of each series, during the passage of each card, an increment of rotation or angular displacement proportional to the position of the corresponding hole in the respective column, a suitable carry-over device being provided at the end of each Without attempting any further general discussion or explanation, it is thought that the invention may be best understood by reference to the accompanying drawings, conventionally illustrating one embodiment,

and forming p-art of this specification, in which draw1ngs:-

Figure 1 1s a View partially in side eleva tion illustrating my improved ltotalizing mechanism in connection with record cards oov of the Hollerith type, the various parts being illustrated more or less conventionally;v

Figure 2 is a fragmentary side elevation on an enlarged scale, showing in more detail two of the differential mechanisms and associated parts illustrated in Figure 1; and

Figure 3 is a transverse section substantially on the line 3-3 of Figure 2, looking in the direction of the arrows.

Referring to the drawings in detail, the record cards which I employ in connection with my invention are preferably of thetype disclosed in the above mentioned Hollerith patents. One. of these cards is illustrated at 1, and, as will be seen from the drawings, has printed thereon columns of digits running numerically from O to 9,r the 9s being located adjacent the bottom or lower edge m f of the cards, and the Os being located near the opposite edge of the card, and arranged in a row or line parallel with such edge. Thus, the numerical value of Aany digit is inversely proportional to its distance from the lower edge a of the card, that is to say, the further a digit is located from such edge, the

' smaller its value.

Any desired number of vertical columns of digits may be employed, the right hand column corresponding to the units place, the next column to the tens place, the thid column to the hundreds place, etc., but for the sake of simplicity of illustration, I have illustrated only two columns, namely, a units column and a tens column.

My invention is particularly applicable to record cards which carry a plurality of such groups of columns, each group being employed to indicate the value or amount of some particular class or type of article or material. Thus, in Figure 1, I-have illustrated a card having three groups of columns, each group comprising a units column and a tens column. Thus, for example, if the cards are used in the lumber industry, the first column a may designate the number of feet of siding, the second column b may designate the number of feet of hardwood flooring, and the third column c may designate the number of feet of soft wood flooring. If used in connection with railroad accounting, the several groups may indicate the respective tonnage of different classes of merchandise hauled during any given period.

In order to adapt these record cards for the operation of automatic totalizing or integrating apparatus, it is the common practice to punch or perforate them at certain digit locations in the various columns. These holes or perforations thus constitute index points, which, by their position, represent numbers indicating the several amounts or values which it is desired to record. Thus, in Figure 1, I have shown the group of columns a as having one perforation at the digit 5 in the ten"s column and another perforation at the digit 2`in the units column; thus indicating the number 52; the groupof columns b as having a perforation at the digit 3 in the tens column, and the digit 4 in the units column, thus indicating the number 34; and the group of columns c as having a perforation at the digit 6 in the tens column and at the digit 7 in the units column, thus indicating the number 67. As above point ed out, the numerical values corresponding to these perforations are inversely proportional to the distance of such perforations from the edge m of the card.

A set of such record cards, after having been perforated, as desired, to indicate vari-I ous amounts or values, are preferably assembled in a bale or package in a feeding device, such as illustrated in Patents 685,608 and 945,236, to Hollerith, and from this `feeding device, the cards are fed one at a time to the controlling mechanism which I shall hereinafter designate as a reading or analyzing device. As shown in the second of theabove mentioned Hollerith patents, this reading device comprises a metal roller or platen 2, driven at constant speed, as by means of an electric motor 3, supplied with current from a suitable source 4. Arranged to bear upon this roller are a plurality of contact fingers or brushes 4a, 4b and 4c, 5a, 5b and 5, the ends of such brushes being' arranged to bear upon the roller in a line parallel with the axis. One finger or brush is provided for each column on the cards.

The brushes 4a, 4b and 4c are separately connected by conductors 6 to a set of control magnets 8 which operate the units totalizingy mechanism, while the brushes 5, 5b and 5 are separately connected through conductors 7 with a set of magnets 9 which operate the 10s totalizing mechanism.. The other terminal of the windings of all of the :nagnetsSand 9 is connected to a common return 10, connected with one side of the battery 4, while the other side of this battery is connected by a conductor 11 'with a brush 12 which also bears upon the roller 2, but at a point beyond the end of the card. Set into the surface of the roller 2 at the point of contact of the brush 12 therewith is a strip of insulation 13, which strip extends through a suitable arc and has its forward end 13 terminating at a point in line with the position occupied by the row of Os on the card, if the contact points of the brushes 4a etc., 5 etc. and 12 are in the same straight line, or in any event, the end 13 of the insulation strip is arranged to pass under the brush 12 at the same instant that the row of Os passes under the other brushes. i

In this connection, it will be understood that the card feeding mechanism is operated in synchronism with the roller 2, that is to Say, a card is fed at each revolution of said reitera lf it is desired to employ my improved totalizing apparatus, now to be described, inV

connection with the usual integrating mechanism such as that developed by Hollerith, there may be connected to each pair of conductors 6 and 7, branch circuits 14 and 15,

these circuits being adapted to extend to in-' tegrating control mechanism such as the relays 25, 26 and magnets 35, 36 of Hollerith Patent 945,236, above mentioned. rlhus, as the cards pass through the reading device, the usual integrating mechanism such as that shown in the Hollerith patent will be operated to add together or cumulate the 'totals of the numbers represented by the perforations in the same group of columns of said cards. Thus, the control circuit 14 and 15, illustrated in Figure 1, as connected to the conductors extendingfrom the brushes 4c and 5"', if connected with the Hollerith apparatus, would serve to integrate the amounts indicated by the perforations in the column group c, as successive cards are fed through the reading device. As distinguished from, or in addition to, this integrating of successive items in the same column positions as the cards are fed through, the object of my present invention is to provide means for cross-totalizing the items indicated by all of the column groups on each card. Thus, Vto refer again to the illustrations previously mentioned, if the record cards relate to the lumber industry, I propose to provide means for showing the total amount of all grades or kinds of lumber indicated by the several column groups, and if the record cards relate to railroad accounting, I propose to provide means for showing the total tonnage made up by all of the -diderent classes of merchandise hauled, as shown in ,the several column groups.

To this end, I employ a plurality of gear trains, one train for the units column, another train for the tens column, etc., each train being made up of a series of units corresponding in number to the number of column groups on the record cards.

These gear trains are supported in a plurality of fixed parallel frame members 16, and the various units of the two gear trains illustrated are designated A, B, C, D and A', B, C', D respectively. As these'units are substantially similar in construction, except as hereinafter explained, a detailed description of one will suce for all. Reference is therefore had to Figures 2 and 3, which clearly illustrate the details. Each of the units A or A' comprises a relatively large gear 17 serving as a p-lanetary gear "carrier, looselyy mounted for rotation upon a fixed stub'shaft 18 set into the frame 16. A. collar 19, fixed to this shaft, serves toprevent lateral dis-1 placementof the large gear 17., lttigidly fixed to the inner end of the stub shaft 18 is a sun gear 20 constituting one member of a did'erential mechanism. Secured to the face of the large gear 17 are a pair of bracket arms 21 extending in axial spaced relation *l and serving to support between them a shaft 22. lournalled at the ends of the shaft 22 are planetary gears 23' and 24, meshing with the sunr gear 20. The planetary gears 23 and 24 also vmesh with a gear 25 similar to the gear 20, which 26, journalled in the frame `16. Thus, the gears 17, 20, 23, 24 and 25 constitute a differential mechanism, and while l have shown such mechanism as employing bevel gears, it will be understood that other types Yof gears can be utilized, if desired. Each unit of each of the gear trains, above referred to,

consists of one of these differential mechi anisms substantially as above described. j

The large gear or planetary gear carrier 17 of the next unit B or B is mounted for free rotation on the shaft 26, while the sun gear 20 of such'units is rigidly secured to said shaft. The same is true for the succeeding units C, C and D. no differential mechanism being employed .at the unit 4ID for reasons which will hereinafter appear.

Referring now to Figure 1,- it will be seen that the gear 25 of the differential mechanism C is secured to a shaft 26x which exgear 25 is fixed to a shaft' tends through a pair of frame members 16 .and carries at its extreme end a 'sprocket im wheel 27, geared by means of a chain 28 to a number wheel 29, mounted for free rotation on a stub shaft 32. Similarly, the gear 25 of the differential mechanism Dis mounted onv a shaft 26g, whichl carries at its extreme end a sprocket wheel 27, geared by means of a chain 28, to a number wheel 30, freely mounted on the shaft 32. y

From the foregoing, it will be understood that the number' wheel 29, driven by theunits gear train A, B, C, is the units wheel, while the number wheel 30. driven by the tenls gear train A', B', C', D is the tens wheel. 33 designates a hundreds wheel, which is mounted on the shaft 32 adjacent the wheel 30, andv is driven from the wheel 30through the usual transfer mechanism designated by the nu meral 34. Thus, when the totals exceed two places, they are transferred to and accumulate on the wheel 33. in the usual manner. larly, additional wheels for thousands, etc.,

Simi- 37', the first adjacent the units train and the port.

III

second adjacent the tens train of differential gearing.- These shafts are continuously driven in synchronism with the drum 2, as for example, by having the shaft 37' driven from the drum 2 by means of a chain 38, and by havingythe two shafts geared together by -means of a chain 39. -Mounted on each of these shafts adjacent each of the differentialvv mechanisms of each train of gears are certain gears and clutches, the construction of which can best be understood by reference to Figures 2 and 3. Mounted to turn freely 7on each of these shafts, as for example, the shaft 37 is a sleeve 40, having formed inte gral therewith two similar spaced gears 41 and 42. Also carried by the sleeve40 beyond the gear 42 is a clutch member 43. A similar and cooperating clutch member 44 is slidably mounted on the shaft, but is splined thereto by means of a key or feather 45. This clutch member 44 has a peripheral groove in which works a yoke 46, carried by an arm 47 the lower portion of which, 48, is somewhat iexible and is secured to a fixed sup- Carried by the arm 47 adjacent 'the corresponding magnet such as 8 or 9 is an armature 49, adapted to kbe attracted by such magnet. c

In the embodiment shown in the drawings, the arm structure 47, 48 and associated parts are secured to and carried by a movable frame member comprising a pair of parallel bars 5() and 51. united at intervals by cross bars v52. As shown in Figure 3, this movable frame structure does not lie in the plane of the shafts 26, but is disposed to one side thereof. The bar 51, however, has an opening through which the clutch member 43 projects, and the bars 50 and 51 are spaced apart a suf-Y fcient distance to receive snugly between them the gear structure 40, 41, 42.

Also supported between the bars 50 and 51 is a shaft 55, on which is mounted a back gear 56, which is preferably of a width substantially double that of the gears 41 and 42,

and which continuously meshes with the gear 58 42. Thus, when one of the magnets such as 8 or 9 is energized, the clutch members 43 and 44 are brought into engagement and the gears 41, 42 and-56 rotated.

Means are provided for causing either the gear 41 or the back gear 56 to mesh with the large gear 17, as desired.. To this end,

the movable frame 50, 51, 52 is so supported as to be capable of being shifted laterally, and in order to effect such lateral shifting, I mount between the bars 50 and 51 of each movable frame a pair of eccentrics 53, 53', each of such eccentrics being secured to a shaft 54 and the two shafts for any one unit being geared together so as to move in synchronism. Thus, by rotating these shafts 54, the movable frame may be shifted laterally from the position shown at A in Figure 2 to that illustrated at B'. When in the irst position, it will be seen that the large gear 17 is in mesh with the back gear 56, and consequently will be driven in one direction by the shaft 37', while in the second position, it

will be seen that the large gear 17 is in mesh with the gear 41, andhence will be driven in the opposite direction by shaft 37.

Each of the arms or members 47 carries an extension 58 in the nature of a pawl, which is adapted to engage and lock the associated gear 42, as clearly shown in Figure 2. When, however, the armature 49 is attracted and the clutch members 43 and 44 lbrought into engagement, the locking pawl 58 is shifted to the left out of engagement with the gear 42, thus permitting this gear and associated parts to turn freely.

vMeans are provided for maintaining the energization of the magnets 8 and 9, after `the circuit has been momentarily closed by the passage of a perforation in the card under one of the brushes of the reading device. Such means may comprise, as shown in the drawings, a contact member 57, secured to but insulated from the movable frame member 50, and having its end so disposed as to be engaged by the locking pawl 58 when it is moved to the left, as the armature/49 is attracted. Referring to Figure 1, it will be seen that when the pawl 58 engages the contact 57 current will iow from one side of the battery through the conductor 11 and brush 12 to the roller 2, thence to the frame of the machine, thence through the arm 47 pawl 58, and contact 57, through the magnet and thence through common return conductor 10 to the other side of the battery, it being assumed, of course, that the roller 2 is grounded to the frame of the machine.

It will be further apparent that the circuit thus closed will be maintained until the forward edge 13 of the insulation strip 13 comes under the brush 12, at which instant the circuit will be interrupted, the clutch members disengaged, and the gears locked by the pawl With the above general explanation of the construction and arrangement of my improved totalizing apparatus, a fuller understanding can best be arrived at by a brief discussion of the operation. Let us consider first the gear train A, B, C. As above pointed out, the magnets 8 of this gear train are connected digit 2 in column Leraars by conductors 6 With the brushes 4a, 4b and 4c corresponding to the position of the units column in the several column groups on the card. Thus, as the first perforation in the units column of the group c passes under the brush 4, the magnet 8 of the differential mechanism C Will be momentarily energized` displacement corresponds with the numerical value of that particular digit Similarly, when the perforation at the p0- sition of digit 4 in the units column of group b passes under the brush 4b, the magnet 8 of the differential mechanism B is energized, and is maintained energized and the clutch members maintained in engagement during the passage of the card from the position of digit 4 to the zero position, and an increment of rotation is imparted to the large gear 17 of differential mechanism B, this ind crement of rotation or angular displacement being proportional tothe location of the positionof the digit 4 in the column. Similarly, when the perforation at the position'of A passes under the brush 4a, the magnet 8 of differential mechanism A is energized, the ,clutch Vmembers brought into engagement, and an increment of rotation imparted to the large gear 17. The clutch members are maintained in engageme'nt and an angular displacement of the large gear 17 is produced to llan-extent proportional tothe location of the position of digit 2 in the column. Y

It will, of course, be understood that the gear trains made up of the several diEerential mechanisms are continuous trains, that is to say, the gears are all so interconnected that motion imparted tothe' rst unit is transmitted to the next succeeding unit throughout the train and finally, tothe last member thereof.

It will thus be seen that regardless of which of the mechanisms A, B or C is actuated first, and regardless of Whether they are yactuated seriatim or simultaneously, the rotation imparted to one mechanismis added to that imparted to the others, in accordance with the relative direction, with the result that the final member `of the train, namely, the shaft 26m is rotated aldistance corresponding to the sum of the increments of rotation or angular displacements. 1mparted to the several gears 17 of the train, or

in other Words, an amount proportional to the numerical value of the sum of the numbers indicated by the location of the digit positions in the units column of the several groups on the card. Thus, the units Wheel 29 is rotated to a corresponding extent.

Similarly, the large gears 17 of the train comprising the B and C are independently actuated by the passage ofthe perforations in the tens columns of the card under the corresponding brushes of the reading device, the angular displacement .imparted to each being proportional to the numerical value of the 'corresponding digit, and the train serving to rotate the final shaft to an extent proportional to the sum of such digits. v

The carry-over mechanism at the ends of the trains Will noW be briefly described. Referring to the units train, the Wheel 35 and cam ange 36 have already been referred to. Arranged to engage the cam flange 36 is a finger 61 carried at theend of a bell crank lever 59, pivoted at 60 to a fixed support and preferably associated With the stop member 62, to limit its movement. The lever 59 is normally held in the position shown in Fi ure 1, by a spring 67. The bell cran r levercarries at its upper end a yoke 63, Working loosely in a groove in a clutch member 64,

splined to the shaft 37 and adapted to engage a cooperating clutch member 65 integral with a gear 66 loose on said shaft, but in constant engagement With the largev gear 17 of differential mechanism D. The cam ange 36 is so located relative to the number Wheel 29 that at the moment When this number Wheel moves from the nine position to the4 ten position, thb flange 36 engages the finger 61, thus swinging the bell crank lever 59toy the left, and bringing the clutch members 64 and 65 into engagement, thereby imparting an increment of rotation to the large gear Wheel 17 of differential mechanism D. The length of the flange 36 is designed so as to hold the clutch members 64 and 65 in engagement for a length of time sufficient to produce in the gear 17 an angular displacement corresponding to one unit. This displacement is thus added to that already imparted to the final shaft 26 of the tens train, thus causing the shaft 263/ to move the tens number Wheel 30 one step further than it would have been moved under the iniuence of shaft 26 only. Tn this way, the units accumulated on the train A, B, C are transferred to the tens train, When thetotal of such units exceeds nine. Similarly, carry over mechanism is provided totransfer increments of rotation from the tens `trainto the hundreds train, etc., Where more than two trainsare utilized.

From the foregoing, it will be obvious that as each card passes through the reading device,the sum of all'numbers indicated by the position ofthe perforations in all of the co1- differential mechanisms A',

umns is registered on -theWhe-els 29 and 30.

- Thus, to again use the illustration in the lumber industry, my improved mechanism serves to indicate the entire amount of all grades of lumber recorded on each card. Furthermore, as successive cards pass through the reading device, these cross totalsare themselves added or accumulated on the Wheels 29, 30 and 33,`so that the grand total represented by all of the numbers punched in all of the columns of any given set of cards can be read old from these Wheels.

It Will, of course, be understood that suit-Y able means are providedfor interrupting the circuit to prevent operation of the gear trains during the period between the passage of successive cards. I may employ the mechanism of Hollerith Patent No.' 945,236, but I prefer to so proportion the length of the insulation strip 1'3 that it holds the circuit open'at the brush 12 until the forward edge a" of each succeeding card has passed under the brushes 4, 5 etc.

I have referred to the sum of the numbers represented by the perforations in the various column .groups of the card, and this will noW be .further explained. In order to A actually add the increments of rotation of all of the Wheels 17 to each other so as to rotate the final shaft 26 an amount proportional to VJche actual arithmetical sum of the several numbers, a' consideration of the mechanism illustrated in Figure l will show that it is necv essary to drive alternate unitsor diderential mechanisms through the back `gear 56. Thus,l

the mechanisms A and C are shown as driven through the back gear, While the.

depressed, remaining depressed until re-l leased, after each operation, as in the case of 'adding machines. .With such a keyboard, it is obvious that means may be provided for reading the depressed keys and actuating my improved totalizing apparatus by means of the relative position in field of such keys. This may be accomplished either electrically or mechanically. WI

Further, while I have illustrated my improved apparatus as operated by electrical` means, it will, of course, be understood that I contemplate the employment of mechanical means also, as within the scope of my invention.

What I claimis r 1. The combination with a record 'card having a plurality of groups of index points arranged so that their positions correspond to definite values or amounts, of a reading ently imparting to a plurality of intermediate members of said train angular displacements proportional to the numbers rep resenting the values or amounts of the points A of the same Idenomination in the groups of said index points on said card.

2. TheA combination with a record card u having a plurality of groups of index points arranged so that their positions correspond to .definite values or amounts, of a reading device, a continuous train of diderential gearing each unit of which transmits its motion to the succeeding unit and comprisesl a planetary gear carrier, a registering device driven by the final member of said gear train, and means controlled by the passage of the record card through said reading device for independently imparting to a plurality of said planetary gear carriers angular displacements proportional to the numbers representing the values or amounts of the points of the same denomination in the groups of said index points on said card.

3.v The combination with a record card having a plurality of index points arranged so that their positions relative to one edge of` the card correspond to definite values or amounts, of a reading device, a series of interconnected diflerential mechanisms operating in train, a constantly rotating shaft, normally disconnected means for independently drivlng each of said differential mechanisms from said shaft, a registering device operatively connected With the iinal member of the train of mechanisms, and means controlled by the passa e of the record card through said reading evice for selectively connecting a plurality of said differential mechanisms to said shaft during extents of rotation thereof respectively proportional to the distances of said several index points from one edge of the card. l

4. An accounting machine including a totalizer having a plurality ofadding elements for each denominational order for adding multi-denominational amounts, means for setting up data in a plurality of the elements in each order of said-totalizer, and means controlled by the ldata setting means for concurrently adding a plurality of multi-denominational amounts in the totalizer Which then indicates the sum.

5. A tabulator adapted to operate upon v 7 record cards successively including record analyzing means for analyzing a plurality of fields on each record, an accumulator, and means controlled by the analyzing means for operating the accumulator from several record fields concurrently to effect cross adding of plurality of items from a single record car 6. A record controlled machine including in combination, record reading means for reading record cards having index point poi sitions in a column and provided with a plurality of independent columns, accumulator mechanism controlled by the passage of the cards through said reading device for indicating, at the end of a single reading operation, the sum of the numbers corresponding to the index point positions in vall of said columns. I

7. In a record controlled machine adapted to be controlled by a record card having a plurality of groups of digit columns each group comprising at least two columns one for units and one for tens, said card also having index point positions in each column, a reading device common to all of said columns and adapted to read the index points in said columns simultaneously, a pair of registering mechanisms, and means controlled 4 by the reading device for adding on one registering mechanism the numbers corresponding to the index point positions in the several units columns and for accumulating on the other registering mechanism the numbers corresponding to the index point positions in the several tens'columns.

8. A record controlled machine controlled by a record card having a plurality of groups of columns, the columns of each group corresponding to figure places in the decimal system, said card also having index point positions in each column, a reading device, a plurality of registering mechanisms, and means controlled by the passage of a card through said reading device for separately but simultaneously adding on the respective registering mechanisms the sets of numbers equivalent to the index point positions in the several columns corresponding to the same iigure place in all the oups. f

9. In apparatus of t e character described, a train of diiierential gearing each unit of which comprises a lanetary gear carrier, a registering device riven by the final member of said train, and means for imparting independent increments of rotation in either one of two directions to each of a plurality of said planetary gear carriers, and means vices, each device relating to a denominational order and having an adding element for each group of points, and means operated under control of said reading means for separately operating the adding elements in the various adding devices concurrently, anda registering mechanism operated under control of said adding devices and concurrently therewith for summating the amounts added on said devices. Y

11. In a machine controlled by a record card containing a plurality of index points representing a plurality of amounts, means for reading said index point-s, dilerential devices under control of said reading means for concurrently adding the related denominational igures of said amounts, and registering mechanism under control of said dilferential devices and operated concurrently therewith for adding all the amounts represented on said card. A

12. The combination with a record card having index points representing a plurality of multi-denominational amounts, means for reading said index points, a series of inte-rconnected differential gear units arranged in axial alignment, all the units of the series relating to a single denomination and one unit being provided for each related denomination in the Various amounts on the card, a constantly rotating shaft common to said units, normally disconnected clutches for independently driving each of said units from said shaft, means under control of said reading device for selectively operating said clutches to connect said units to the shaft so that each unit is operated an extent depending upon the size of the related denominational amount, and registering means operated by the end unit for adding the amounts added by said units. i

In testimony whereof'I aliix my signature.A 

